You'll have to take my word for it ! but just before I shot this video it showed 52.8mpg and an average speed of 38mph. (I had idled for 4 minutes while I fixed my camera phone, hence the drop in figures) I've tried to get a good mpg previously on the same route and only managed less than 44mpg. The car hasn't been remaped so the readings are as accurate as they can be for the standard equipment.
Alfa 159 Economy 1.9JTDm 16v - YouTube
The key to good mpg is a clean EGR and a well flowing DPF. I have both. The EGR has an orifice plate/blanking plate fitted and the intake was cleaned. The DPF now has some holes drilled into the core to help it breath more easily and the performance has improved dramtically - no more praying the revs will rise in time for when I need them as I pull out of a junction. Low down torque has appeared from nowhere
I am thinking of putting together some DPF testing kits, if anyone is interested. They'll cost only a couple of pounds each. I will also be sharing the parts details so you can make one yourself if you can get the parts for less.
Alternatively I thought about a share scheme - someone who wants a kit pays me circa £10 deposit + postage. If someone else wants it afterwards they pay the first person £10 plus postage etc, and it gets passed around, or, it gets sent back to me in the meantime if necessary.
The only thing needed to test your dpf will be the simple kit plus your own 17mm spanner to remove the temperature probe from the dpf housing (a very easy task). Not all dpf's can be tested with this kit, but I'll give more details of that when i've tested the first kit for suitability
If anyone is interested in trying this out, to save me wasting time on it unecessarily please let me know somehow that you want to have a go. if nobody responds I'll just assume nobody is interested
I can't say fairer than that.
If you suffer from poor performance and you test your dpf to find it is blocked you can then make an informed choice about what to do. if you test the dpf and it is working well you can then look elsewhere for a fault, safe in the knowledge that a blocked dpf is not holding you back.